Hobie USA builds the sail right here in Oceanside California. Yes, Made in the USA.
I do know that a few of the "custom" sailmakers send their digital patterns to over seas lofts for production.
Thanks for the correction. I guess I should know better than to repeat hearsay.
The Calvert sails I've owned were built in the US, and of equivalent price but much better quality than class legal sails. I would be surprised if that doesn't hold true for the Wave.